FOR DAY: Hats are a very versatile accessory and when worn correctly, can transform any drab outfit into a fab fashion statement. For day, don't shy away from floppy beanies (available in an array of colours), or a straw fedora worn out for lunch on a sunny spring day. Wear a printed trucker with jeans and a T on relaxed days.
FOR NIGHT: Again, the options are endless. Try a sequinned version of the floppy beanie, and a structured trilby or bowling hat is a nice homage to a bygone era. The hat is normally the main focus of your outfit so make sure you dress to the theme to get your desired look right.